In the last two years it has been of tremendous value for administrators who find their support site hard to navigate and the a good overview of patches and updates.
I see nothing Oracle can gain by doing this, no patches where available only metadata with links to their own support site for downloads ( if you have an account with access to the patches ).
Since they already done a much, much worse thing by closing the OpenSolaris source this comes as no surprise. The way companies treat innovation and community efforts are important when you chose a operating system or database engine. Tell your sales representative what you think about these things.
A huge thanks to the people who put time and effort into making wesunsolve.net, it was very useful and will be missed.